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Implementation of Doppler Beam Sharpening Technique for Synthetic-Aperture Radars

Publisher : Lecture Notes in Electrical Engineering

Year : 2019

Abstract : For the airborne radar systems, resolution has always been a challenge. Fine resolution can be achieved by increasing the aperture of the antenna. The carrying capacity and the streamline structure of the aircraft are the limiting factors. Considering the limitations, the aperture of the antenna cannot be increased after a limit. Therefore, a special category of radars called as Pulse-Doppler radars (PD) are usually used for airborne and spaceborne radar applications. PD radars possess the capability of detecting the targets in the mist of background clutter. Pulse compression is employed at the radar receiver to obtain the fine range resolution. However, it becomes difficult for the radar to resolve two targets present at the same distance. In this scenario, the angular resolution has to be considered for the detection. Doppler Beam Sharpening (DBS) is a technique used to observe and improve the azimuth resolution of the radar. In this paper, the DBS technique is presented to resolve the targets at the same range. © 2019, Springer Nature Singapore Pte Ltd.

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